US3497790A - Windscreen wiper control circuits - Google Patents

Windscreen wiper control circuits Download PDF

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Publication number
US3497790A
US3497790A US612541A US3497790DA US3497790A US 3497790 A US3497790 A US 3497790A US 612541 A US612541 A US 612541A US 3497790D A US3497790D A US 3497790DA US 3497790 A US3497790 A US 3497790A
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US
United States
Prior art keywords
motor
switch
windscreen wiper
windscreen
wiper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US612541A
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English (en)
Inventor
Michel Tixier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Regie Nationale des Usines Renault
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Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
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Publication of US3497790A publication Critical patent/US3497790A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0803—Intermittent control circuits

Definitions

  • This invention relates to improvements in the control circuits of electric windscreen wipers adapted to stop automatically in a predetermined position.
  • Electro-motor windscreen wiper circuits adapted automatically to stop the wiper blades in a predetermined position are in current use.
  • Some of these circuits comprise notably a single-pole three-way reversing switch having a momentary position due to the presence of a return spring urging the switch movable member to its inoperative position when this member is released; this position is energized through a contact adapted to be closed periodically by a cam driven from the motor shaft or by brush contacts in frictional engagement with concentric tracks of the motor shaft.
  • reaction torque resulting from the inertia of the movable assembly exceeds the armature braking torque (for example when the wiper blades are freed from their inoperative position when the vehicle is being driven at a relatively high speed).
  • the cam oversteps the stop position, the armature is carried along by the blades and the motor is re-energized, possibly during several successive cycles.
  • FIGURE 1 is a wiring diagram of the automatic windscreen wiper control circuit in the case of a driving motor of the excitation-winding type
  • FIGURE 2 is an alternate form of embodiment wherein the electric motor is of the permanent-magnet type, the armature thereof being adapted to be braked in the preselected stop position by short-circuiting said armature.
  • the wiring diagram illustrated therein comprises an electric motor 1 having an excitation winding 2 and an output shaft provided with a earn 3 adapted to actuate a follower arm 4 engaging alternately the terminal 5 or the fixed stop or free terminal 6, the first terminal 5 being connected to the positive terminal of the source of current, i.e. the storage battery 10.
  • a reversing switch 7 having two positions 8 and 9 connects one of the motor terminals either in position 8 through the winding 11 of a bimetal strip 14 to the positive terminal 10 of the battery, or in position 9 to the switch terminal 12, bimetal strip 14 and cam follower arm 4 then engaging the terminal 5.
  • the bimetal strip 12 After a predetermined time period the bimetal strip 12 cools down and resumes its inoperative position, thus opening the circuit 7, 9 and 12 and safely avoiding any damage to the motor in case of faulty operation of the control means, this motor being prevented from remaining or being energized for example in case:
  • FIGURE 2 has the following diiferences with respect to the circuit of FIGURE 1:
  • the excitation winding 2 is replaced by permanent magnets; the terminal 6 is grounded.
  • the bimetal strip will preferably be of the winding type which heats up as rapidly as possible; however, the thermal inertia of this strip when cooling down should be at least equal to the time necessary for the windscreen-wiper blades to make a complete to-andfro movement.
  • An electric control device for stopping the blades of a windscreen wiper system at a preselected position comprising a windscreen wiper motor, a current source, a double throw single pole switch, the first position of which normally connects said current source to energize said motor and the second position controls the de-energization thereof, a bimetal strip and a bimetal strip heating winding connected to said source in parallel, said winding being connected in series to said first switch position and disposed to heat said bimetal strip, said bimetal strip having a heated position in which it serially connects said second switch position to said current source and a cooled position out of contact with said switch whereby said himetal strip will keep said motor energized for a period after said switch is moved from said first to said second position, a cam actuated switching means having normally closed contacts in series with said current source and said bimetal strip, and cam means driven by said motor to open said contacts when said blades are in a preselected position.
  • An electric control device for stopping the blades of a windscreen wiper system at a preselected position comprising a windscreen wiper motor, a current source, a double throw, single pole switch the first position of which normally connects said current source to energize said motor and the second position controls the deenergization thereof, means connecting said current source to said second position including means to open said connection after a time delay to thus deenergize said motor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US612541A 1966-02-04 1967-01-30 Windscreen wiper control circuits Expired - Lifetime US3497790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR48543A FR1476680A (fr) 1966-02-04 1966-02-04 Commande d'essuie-vitre à arrêt dans une position déterminée

Publications (1)

Publication Number Publication Date
US3497790A true US3497790A (en) 1970-02-24

Family

ID=8600641

Family Applications (1)

Application Number Title Priority Date Filing Date
US612541A Expired - Lifetime US3497790A (en) 1966-02-04 1967-01-30 Windscreen wiper control circuits

Country Status (4)

Country Link
US (1) US3497790A (de)
DE (1) DE1630979C3 (de)
FR (1) FR1476680A (de)
GB (1) GB1169588A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716766A (en) * 1970-12-17 1973-02-13 Nippon Denso Co Cooperative system of windshield washer and wiper with intermittent wiper operating mechanism
US3774091A (en) * 1968-05-23 1973-11-20 R Kearns Intermittent windshield wiper system with electrodynamic braking
US3919612A (en) * 1973-05-18 1975-11-11 Bosch Gmbh Robert Interval windshield wiper arrangement
US4123694A (en) * 1976-10-09 1978-10-31 Itt Industries, Inc. Circuit arrangement for a wiper driving motor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307204A (en) * 1938-09-21 1943-01-05 Louis B Ehrlich Electric windshield wiper
US2364603A (en) * 1940-02-09 1944-12-12 Stewart Warner Corp Electric windshield wiper
US2560000A (en) * 1949-01-27 1951-07-10 Marquette Metal Products Co Electric windshield wiper with dynamic brake parking
US2611116A (en) * 1950-01-06 1952-09-16 Redmond Company Inc Parking control for windshield wipers
US2651013A (en) * 1950-11-03 1953-09-01 Redmond Company Inc Electric windshield wiper control
GB775631A (en) * 1954-09-17 1957-05-29 Alfa Romeo Spa Improvements relating to the control of electric motors driving windshield wipers
US3253206A (en) * 1963-12-23 1966-05-24 Gen Motors Corp Windshield wiper actuating mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307204A (en) * 1938-09-21 1943-01-05 Louis B Ehrlich Electric windshield wiper
US2364603A (en) * 1940-02-09 1944-12-12 Stewart Warner Corp Electric windshield wiper
US2560000A (en) * 1949-01-27 1951-07-10 Marquette Metal Products Co Electric windshield wiper with dynamic brake parking
US2611116A (en) * 1950-01-06 1952-09-16 Redmond Company Inc Parking control for windshield wipers
US2651013A (en) * 1950-11-03 1953-09-01 Redmond Company Inc Electric windshield wiper control
GB775631A (en) * 1954-09-17 1957-05-29 Alfa Romeo Spa Improvements relating to the control of electric motors driving windshield wipers
US3253206A (en) * 1963-12-23 1966-05-24 Gen Motors Corp Windshield wiper actuating mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774091A (en) * 1968-05-23 1973-11-20 R Kearns Intermittent windshield wiper system with electrodynamic braking
US3716766A (en) * 1970-12-17 1973-02-13 Nippon Denso Co Cooperative system of windshield washer and wiper with intermittent wiper operating mechanism
US3919612A (en) * 1973-05-18 1975-11-11 Bosch Gmbh Robert Interval windshield wiper arrangement
US4123694A (en) * 1976-10-09 1978-10-31 Itt Industries, Inc. Circuit arrangement for a wiper driving motor

Also Published As

Publication number Publication date
GB1169588A (en) 1969-11-05
FR1476680A (fr) 1967-04-14
DE1630979A1 (de) 1971-03-25
DE1630979B2 (de) 1979-08-16
DE1630979C3 (de) 1980-04-24

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